Perhaps you should try some spelling variations:
va thanh » ban thanh, va tinh, le thanh
lang xa » lang ha, dang xay, lang van
hieu ve » hieu va, hieu van
sach ky » sac ky, sach ty, sach kem
cac luc » cau luc, coc luc, cac nuoc
de cua » le cua, te cua, dieu cua
ve cac » va cac, vien cac
cua te » cua tu

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach ky) OR (sach y)) lang xa hoi. hieu ve cac luc ((va thanh) OR (gia thanh)) de cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach ky) or (sach y)) lang xa hoi. hieu ve cac luc ((va thanh) OR (gia thanh)) de cua te~".
• Adding a wildcard symbol may retrieve word variants: su ((sach ky) or (sach y)) lang xa hoi. hieu ve cac luc ((va thanh) OR (gia thanh)) de cua te*.